Among his most unconventional moves is Sullivan’s abandonment of compositional strictures. Whereas landscapes are most often depicted in a horizontal format, most of Sullivan’s are vertically oriented. In Landscape 3, Mountain #6, and Mountain #12, the artist shoots mountains deep into the distance, but from a narrowed, tunnel-vision-like perspective. He prints in large formats, up to 60 x 40 inches, so despite their verticality, the towering images envelop the viewer. The aforementioned works employ a limited palette of neutral colors, from blue-gray to warm taupe, and in the former two, the landscapes seem on the verge of dissolving.